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Journal of Optometry

James Q Truong, Nabin R Joshi, Kenneth J Ciuffreda
PURPOSE: There have been several studies investigating static, baseline pupil diameter in visually-normal individuals across refractive error. However, none have assessed the dynamic pupillary light reflex (PLR). In the present study, both static and dynamic pupillary parameters of the PLR were assessed in both the visually-normal (VN) and the mild traumatic brain injury (mTBI) populations and compared as a function of refractive error. METHODS: The VN population comprised 40 adults (22-56 years of age), while the mTBI population comprised 32 adults (21-60 years of age) over a range of refractive errors (-9...
March 2, 2017: Journal of Optometry
Stephanie Rosemann, Inga-Maria Wefel, Volkan Elis, Manfred Fahle
OBJECTIVE: Detection and identification of moving targets is of paramount importance in everyday life, even if it is not widely tested in optometric practice, mostly for technical reasons. There are clear indications in the literature that in perception of moving targets, vision and hearing interact, for example in noisy surrounds and in understanding speech. The main aim of visual perception, the ability that optometry aims to optimize, is the identification of objects, from everyday objects to letters, but also the spatial orientation of subjects in natural surrounds...
February 23, 2017: Journal of Optometry
Avesh Raghunandan, Berta Karmazinaite, Andrea S Rossow
PURPOSE: Letter sequence recognition accuracy has been postulated to be limited primarily by low-level visual factors. The influence of high level factors such as visual memory (load and decay) has been largely overlooked. This study provides insight into the role of these factors by investigating the interaction between letter sequence recognition accuracy, letter string length and report condition. METHODS: Letter sequence recognition accuracy for trigrams and pentagrams were measured in 10 adult subjects for two report conditions...
February 18, 2017: Journal of Optometry
Jorge A Calvo-Sanz, Javier Ruiz-Alcocer, Miguel A Sánchez-Tena
PURPOSE: To compare and analyze the interchangeability of three measuring systems, each based on a different technique, for central corneal thickness (CCT) analysis. METHODS: CCT measurements were measured using optical coherence tomography (OCT), non-contact specular microscopy (NCSM), and ultrasonic pachymetry (USP) in 60 eyes of 60 healthy patients with a mean age of 66.5±15.0 years and a mean spherical equivalent of 0.43±1.14 D. Analysis of variations in measurement concordance and correlation among the three different methods were performed...
February 18, 2017: Journal of Optometry
Neeraj Kumar Singh, Revathy Mani, Jameel Rizwana Hussaindeen
PURPOSE: To evaluate the changes in the stimulus and response Accommodative Convergence to Accommodation (AC/A) ratio following vision therapy (VT) in Convergence Insufficiency (CI). METHODS: Stimulus and response AC/A ratio were measured on twenty five CI participants, pre and post 10 sessions of VT. Stimulus AC/A ratio was measured using the gradient method and response AC/A ratio was calculated using modified Thorington technique with accommodative responses measured using WAM-5500 open-field autorefractor...
January 23, 2017: Journal of Optometry
Manuel Rodríguez-Vallejo, Diego Montagud, Juan A Monsoriu, Walter D Furlan
No abstract text is available yet for this article.
January 11, 2017: Journal of Optometry
Philip G Griffiths, Robert H Taylor, Lisa M Henderson, Brendan T Barrett
No abstract text is available yet for this article.
January 4, 2017: Journal of Optometry
Yasmine L Pilz, Sherry J Bass, Jerome Sherman
In recent years, the term mitochondrial optic neuropathy (MON) has increasingly been used within the literature to describe a group of optic neuropathies that exhibit mitochondrial dysfunction in retinal ganglion cells (RGCs). Interestingly, MONs include genetic aetiologies, such as Leber hereditary optic neuropathy (LHON) and dominant optic atrophy (DOA), as well as acquired aetiologies resulting from drugs, nutritional deficiencies, and mixed aetiologies. Regardless of an inherited or acquired cause, patients exhibit the same clinical manifestations with selective loss of the RGCs due to mitochondrial dysfunction...
December 28, 2016: Journal of Optometry
Veronica García-López, Claudia García-López, Victoria de Juan, Raul Martin
PURPOSE: Surgically induced astigmatism (SIA) caused by the incision after cataract surgery may be calculated to improve IOL toric power calculation and achieve better visual outcome. SIA could be determined as the difference between preoperative and postoperative keratometry expressed in polar values using different equations. The objective of this study is to compare the SIA calculated with two different polar value analysis methods [Method #1: KP (90)/KP (135) developed to be used with incisions placed at 90° and Method #2: AKP/AKP (+45) developed to be used independently of the incision location]...
December 28, 2016: Journal of Optometry
Antonio Lopez Alemany, Vicente Compañ Moreno, Jesús Merayo Lloves, José M González-Méijome
No abstract text is available yet for this article.
January 2017: Journal of Optometry
Charles W Mcmonnies
Dry eye syndromes can involve both nociceptive and neuropathic symptoms. Nociceptive symptoms are the normal physiological responses to noxious stimuli. Neuropathic symptoms are caused by a lesion or disease of the somatosensory nervous system and can be the result of hypersensitisation of peripheral or central corneal and conjunctival somatosensory nerves. For example, inflammation could induce neuroplastic peripheral sensitisation of the ocular surface or lid wiper and exacerbate nociceptive symptoms. Neuropathic symptoms may explain the incommensurate relation between signs and symptoms in some dry eye syndromes although absence of signs of a dry eye syndrome may also be a consequence of inappropriate methods used when examining for them...
January 2017: Journal of Optometry
William Ngo, Sruthi Srinivasan, Diane Houtman, Lyndon Jones
PURPOSE: To determine the combined effect of TheraTears(®) Lubricant Eye Drops, TheraTears(®) SteriLid Eyelid Cleanser, and TheraTears(®) Nutrition on dry eye signs and symptoms. METHODS: This prospective study enrolled 28 dry eye participants. Participants were instructed to use the Lubricant Eye Drops at least 2-4× a day, SteriLid 1-2× a day, and Nutrition 3 gel caps once a day. Participants were followed up at baseline, 1 month and 3 months. Outcome variables were the Ocular Surface Disease Index (OSDI), Symptom Assessment iN Dry Eye (SANDE) questionnaire, non-invasive tear break-up time (NIBUT), osmolarity, number of meibomian glands blocked (#MG blocked), meibum quality, eyelid margin features, Schirmer's test, tear film lipid layer thickness (LLT), meniscus height, corneal and conjunctival staining...
January 2017: Journal of Optometry
William Ngo, Sruthi Srinivasan, Adam Keech, Nancy Keir, Lyndon Jones
PURPOSE: To compare the difference in Ocular Surface Disease Index(©) (OSDI) scores when participants were given the OSDI to complete on their own (self-guided, SG), versus under the guidance of the examiner (examiner-guided, EG). METHODS: 100 participants enrolled in this prospective two-visit study (fifty under-45 years old, 38F/12M; and fifty 45 years-and-older, 42F/8M). Participants who scored ≥1 on the Subjective Evaluation of Symptoms of Dryness (SESoD) were included in this study...
January 2017: Journal of Optometry
Daniel Tilia, Anna Munro, Jiyoon Chung, Jennifer Sha, Shona Delaney, Danny Kho, Varghese Thomas, Klaus Ehrmann, Ravi Chandra Bakaraju
PURPOSE: To compare the visual performance of prototype contact lenses which extend depth-of-focus (EDOF) by deliberate manipulation of multiple higher-order spherical aberration terms and a commercially-available center-near lens (AIR OPTIX Aqua Multifocal, AOMF). METHODS: This was a prospective, cross-over, randomized, single-masked (participant), short-term clinical trial where 52 participants (age 45-70 years) were stratified as low, medium or high presbyopes and wore EDOF and AOMF on different days...
January 2017: Journal of Optometry
Gonzalo Carracedo, Carlos Carpena, Pablo Concepción, Victor Díaz, Miguel García-García, Nahla Jemni, Victoria Eugenia Lledó, Marina Martín, Cristina Pastrana, Raquel Pelissier, Albena Veselinova, Xiaoyu Wang, Jesus Pintor
No abstract text is available yet for this article.
January 2017: Journal of Optometry
Massimo Camellin, Jacopo Maria Guidotti, Samuel Arba Mosquera
PURPOSE: To evaluate the efficacy and safety of Corneal-Wavefront guided transepithelial photorefractive keratectomy (TransPRK) after corneal collagen cross linking (CXL) in keratoconic patients. METHODS: In this retrospective, non-comparative, consecutive case series, 39 keratoconic eyes underwent Corneal-Wavefront guided TransPRK for the correction of aberrations at least 4 months after conventional CXL at SEKAL Rovigo Microsurgery Centre, Rovigo, Italy. Two eyes (5%) underwent a secondary laser retreatment for the improvement of post-operative visual acuity and were not included in this retrospective analysis...
January 2017: Journal of Optometry
Jaume Pujol, Juan Carlos Ondategui-Parra, Llorenç Badiella, Carles Otero, Meritxell Vilaseca, Mikel Aldaba
PURPOSE: To conduct a clinical validation of a virtual reality-based experimental system that is able to assess the spherical subjective refraction simplifying the methodology of ocular refraction. METHODS: For the agreement assessment, spherical refraction measurements were obtained from 104 eyes of 52 subjects using three different methods: subjectively with the experimental prototype (Subj.E) and the classical subjective refraction (Subj.C); and objectively with the WAM-5500 autorefractor (WAM)...
January 2017: Journal of Optometry
Christopher M Putnam, Pauline J Bland, Carl J Bassi
PURPOSE: This study evaluated the summed measures of macular pigment optical density (MPOD) spatial distribution and their effects on intraocular scatter using a commercially available device (C-Quant, Oculus, USA). METHODS: A customized heterochromatic flicker photometer (cHFP) device was used to measure MPOD spatial distribution across the central 16° using a 1° stimulus. MPOD was calculated as a discrete measure and summed measures across the central 1°, 3...
January 2017: Journal of Optometry
Masoud Safarzadeh, Parvin Azizzadeh, Pedram Akbarshahi
PURPOSE: This study aimed to compare the efficacy of two sustained-release formulation of artificial tear drops. PATIENTS AND METHODS: This is a randomized patient-masked clinical trial, a total 88 patients into two group A (n=41; with single dose of artificial tear, containing dextran 70, 1mg/ml and hypromellose, 3mg/ml hydroxypropyl methylcellulose (HPMC) and group B (n=47; with multidose of artificial tear, containing 0.3g HPMC and 0.1g of dextran 70, with 0...
December 15, 2016: Journal of Optometry
Prakash Adhikari, Pratik Chettry
No abstract text is available yet for this article.
December 9, 2016: Journal of Optometry
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